AllocationProfiler: introduce allocation_profiler flag in V8 api.

src/isolate.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1772 matching lines @@
       random_number_generator_(NULL),
       has_fatal_error_(false),
       use_crankshaft_(true),
       initialized_from_snapshot_(false),
       cpu_profiler_(NULL),
       heap_profiler_(NULL),
       function_entry_hook_(NULL),
       deferred_handles_head_(NULL),
       optimizing_compiler_thread_(NULL),
       sweeper_thread_(NULL),
-      stress_deopt_count_(0) {
+      stress_deopt_count_(0),
+      allocation_profiler_(false) {
   id_ = NoBarrier_AtomicIncrement(&isolate_counter_, 1);
   TRACE_ISOLATE(constructor);
 
   memset(isolate_addresses_, 0,
       sizeof(isolate_addresses_[0]) * (kIsolateAddressCount + 1));
 
   heap_.isolate_ = this;
   stack_guard_.isolate_ = this;
 
   // ThreadManager is initialized early to support locking an isolate
@@ skipping 337 matching lines @@
       && CPU::SupportsCrankshaft();
 
   if (function_entry_hook() != NULL) {
     // When function entry hooking is in effect, we have to create the code
     // stubs from scratch to get entry hooks, rather than loading the previously
     // generated stubs from disk.
     // If this assert fires, the initialization path has regressed.
     ASSERT(des == NULL);
   }
 
+  if (is_allocation_profiler_enabled()) {
+    ASSERT(des == NULL);
+  }
+
   // The initialization process does not handle memory exhaustion.
   DisallowAllocationFailure disallow_allocation_failure;
 
   InitializeLoggingAndCounters();
 
   InitializeDebugger();
 
   memory_allocator_ = new MemoryAllocator(this);
   code_range_ = new CodeRange(this);
 
@@ skipping 355 matching lines @@
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
 } }  // namespace v8::internal